Error 5 when installing service pack 2 Tags: Configuration Registry Windows XP Last response: February 12, 2010 12:45 AM in Windows XP Share Anonymous February 11, 2010 3:21:09 PM Hello, I got an error 5:access denied could not back up registry key when trying to install Service Pack 2 for Windows xp More about : error installing service pack Emolaser February 11, 2010 4:17:22 PM Has the registry key already been used? If so, you would more than likely have to order a replacement registry key from one of Microsoft's caller lines. I beileve a new key would cost around 20 USD, not quite sure though. Hopefully, this will help. saran008 February 12, 2010 12:44:48 AM you can edit the Permissions on this registry key to see if doing so will allow the installation of SP2 to complete : Start > Run > type in regedit Click OK or press Enter Click the plus sign next to HKEY_CLASSES_ROOT Scroll down to .dvr-ms *Right* clickt .dvr-ms and choose Permissions Make sure that System is listed with these Permissions: Full Control Read If not, check those boxes and then click Apply, OK. Close the registry editor. Then read the pre-installation links that PABear provided. IF the Access Denied message appears after doing all of the above, check http://winhlp.com/node/125#Cannot_install_Service_Pack_... specifically, the 'Access Denied' section. Can't find your answer ? Ask ! Get the answer saran008 February 12, 2010 12:45:31 AM Log-on as Administrator and disable your anti-virus application before attempting to install WinXP SP2. Windows XP Service Pack 2 Problem Solver: http://winhlp.com/WxSP2.htm What to Know Before Downloading/Installing SP2 http://www.microsoft.com/windowsxp/sp2/sp2_whattoknow.m... Installing SP2 Step-by-Step http://support.microsoft.com/default.aspx?scid=fh;[ln];xpsp2insthowto Troubleshooting Your Installation http://support.microsoft.com/default.aspx?scid=fh;[ln];xpsp2insttshoot WinXP SP2 FAQ: What to do after installing SP2 http://support.microsoft.com/default.aspx?scid=fh;ln;xpsp2installed Service Pack (any) Installation Checklist (MVP Jupiter Jones) http://www3.telus.net/dandemar/spackins.htm WinXP SP2-specific Page (MVP Jupiter Jones) http://www3.telus.net/dandemar/xpsp2.htm The hard disk space requirements for Windows XP Service Pack 2 http://support.microsoft.com/default.aspx?kbid=837783 Can't find your answer ? Ask ! Publish Related resources Service Pack 2 Set up error Forum service pack 2 installing - copy error Forum Eflc fatal error windows xp need to have service pack 3 or higher top poceed 2 Forum Visio 2002 Service Pack 2 (SP 2 ) installation Forum Installed Service Pack 2 - All I get is a desktop picture Forum Service Pack 2 Forum Service Pack 2 for WinXP Tablet Edition Forum Service Pack 2 and Internet Explorer Forum Service pack 2 crashes on reboot Forum XP Service Pack 2 Compatibility Forum Service Pack 2 Forum XP Service pack 2 Forum Service pack error - need help pwease :) Forum cannot install Service Pack 2 / msgina.dll corrupted error Forum Can't Install Internet Explorer Service Pack 1 Forum Service Pack 2 Problems Forum product key not valid for service pack 2 Forum SERVICE PACK 2 Forum HELP!!! Please with Windows XP Forum What is wrong with my computer when the icons n my desktop will not appear Forum More resources Read discussions in other Windows XP categories Configuration Customization Drivers Security Video !